Finding the Third Proportional to 713,500 and 978,393

Step by Step Solution

1. Step 1: Write the proportion equation
   713,500 : 978,393 = 978,393 : x
2. Step 2: Convert to fraction form
   713,500/978,393 = 978,393/x
3. Step 3: Cross multiply
   713,500x = 978,393 × 978,393
4. Step 4: Simplify right side
   713,500x = 957,252,862,449
5. Step 5: Solve for x
   x = 957,252,862,449/713,500
6. Step 6: Final answer
   x = 1,341,629.80